Extended software component model for testing and reuse

Component Based Software Development is gaining popularity in recent years. In this way of software development, software components, which are typically black-box components, are intensively reused to construct new systems. The existed component models describe the characteristics of component from different aspects. However, there is not certain information about component testing. In this paper, we propose an extended component model that supported the component testing and reuse. A model for component specification and composition is established through extending the semantic specification, the protocol specification and the testing specification in the component interface. Then we give a model for component implementation based on Web Services. Finally, we discuss the validation of model, and it can support the development, testing and reuse of component.